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<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> * Copyright (c) 2010-2011, NVIDIA Corporation</span>
<a name="l00003"></a>00003 <span class="comment"> * All rights reserved.</span>
<a name="l00004"></a>00004 <span class="comment"> *</span>
<a name="l00005"></a>00005 <span class="comment"> * Redistribution and use in source and binary forms, with or without</span>
<a name="l00006"></a>00006 <span class="comment"> * modification, are permitted provided that the following conditions are met:</span>
<a name="l00007"></a>00007 <span class="comment"> *   * Redistributions of source code must retain the above copyright</span>
<a name="l00008"></a>00008 <span class="comment"> *     notice, this list of conditions and the following disclaimer.</span>
<a name="l00009"></a>00009 <span class="comment"> *   * Redistributions in binary form must reproduce the above copyright</span>
<a name="l00010"></a>00010 <span class="comment"> *     notice, this list of conditions and the following disclaimer in the</span>
<a name="l00011"></a>00011 <span class="comment"> *     documentation and/or other materials provided with the distribution.</span>
<a name="l00012"></a>00012 <span class="comment"> *   * Neither the name of NVIDIA Corporation nor the</span>
<a name="l00013"></a>00013 <span class="comment"> *     names of its contributors may be used to endorse or promote products</span>
<a name="l00014"></a>00014 <span class="comment"> *     derived from this software without specific prior written permission.</span>
<a name="l00015"></a>00015 <span class="comment"> *</span>
<a name="l00016"></a>00016 <span class="comment"> * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS &quot;AS IS&quot; AND</span>
<a name="l00017"></a>00017 <span class="comment"> * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED</span>
<a name="l00018"></a>00018 <span class="comment"> * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE</span>
<a name="l00019"></a>00019 <span class="comment"> * DISCLAIMED. IN NO EVENT SHALL &lt;COPYRIGHT HOLDER&gt; BE LIABLE FOR ANY</span>
<a name="l00020"></a>00020 <span class="comment"> * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES</span>
<a name="l00021"></a>00021 <span class="comment"> * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;</span>
<a name="l00022"></a>00022 <span class="comment"> * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND</span>
<a name="l00023"></a>00023 <span class="comment"> * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT</span>
<a name="l00024"></a>00024 <span class="comment"> * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS</span>
<a name="l00025"></a>00025 <span class="comment"> * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span>
<a name="l00026"></a>00026 <span class="comment"> */</span>
<a name="l00027"></a>00027 
<a name="l00028"></a>00028 <span class="preprocessor">#pragma once</span>
<a name="l00029"></a>00029 <span class="preprocessor"></span>
<a name="l00030"></a>00030 <span class="preprocessor">#include &lt;cmath&gt;</span>
<a name="l00031"></a>00031 <span class="preprocessor">#include &lt;limits&gt;</span>
<a name="l00032"></a>00032 <span class="preprocessor">#include &lt;nih/basic/types.h&gt;</span>
<a name="l00033"></a>00033 
<a name="l00034"></a>00034 <span class="keyword">namespace </span>nih {
<a name="l00035"></a>00035 
<a name="l00036"></a>00036 <span class="preprocessor">#define M_PIf     3.141592653589793238462643383279502884197169399375105820974944592f</span>
<a name="l00037"></a>00037 <span class="preprocessor"></span><span class="preprocessor">#define M_PI_2f   6.283185307179586f</span>
<a name="l00038"></a>00038 <span class="preprocessor"></span><span class="preprocessor">#define M_INV_PIf 0.3183098861837907f</span>
<a name="l00039"></a>00039 <span class="preprocessor"></span>
<a name="l00040"></a>00040 <span class="preprocessor">#define M_PI 3.141592653589793238462643383279502884197169399375105820974944592</span>
<a name="l00041"></a>00041 <span class="preprocessor"></span><span class="preprocessor">#define M_PI_2 (2.0 * M_PI)</span>
<a name="l00042"></a>00042 <span class="preprocessor"></span>
<a name="l00043"></a>00043 <span class="preprocessor">#if WIN32</span>
<a name="l00044"></a>00044 <span class="preprocessor"></span><span class="preprocessor">#include &lt;float.h&gt;</span>
<a name="l00045"></a>00045 
<a name="l00046"></a>00046 <span class="keyword">inline</span> <span class="keywordtype">bool</span> is_finite(<span class="keyword">const</span> <span class="keywordtype">double</span> x) { <span class="keywordflow">return</span> _finite(x) != 0; }
<a name="l00047"></a>00047 <span class="keyword">inline</span> <span class="keywordtype">bool</span> is_nan(<span class="keyword">const</span> <span class="keywordtype">double</span> x) { <span class="keywordflow">return</span> _isnan(x) != 0; }
<a name="l00048"></a>00048 <span class="keyword">inline</span> <span class="keywordtype">bool</span> is_finite(<span class="keyword">const</span> <span class="keywordtype">float</span> x) { <span class="keywordflow">return</span> _finite(x) != 0; }
<a name="l00049"></a>00049 <span class="keyword">inline</span> <span class="keywordtype">bool</span> is_nan(<span class="keyword">const</span> <span class="keywordtype">float</span> x) { <span class="keywordflow">return</span> _isnan(x) != 0; }
<a name="l00050"></a>00050 
<a name="l00051"></a>00051 <span class="preprocessor">#endif</span>
<a name="l00052"></a>00052 <span class="preprocessor"></span>
<a name="l00054"></a>00054 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;
<a name="l00055"></a>00055 <span class="keyword">inline</span> NIH_HOST_DEVICE T sgn(<span class="keyword">const</span> T x) { <span class="keywordflow">return</span> x &gt; 0 ? T(1) : T(-1); }
<a name="l00056"></a>00056 
<a name="l00058"></a>00058 <span class="keyword">inline</span> NIH_HOST_DEVICE <span class="keywordtype">float</span> round(<span class="keyword">const</span> <span class="keywordtype">float</span> x)
<a name="l00059"></a>00059 {
<a name="l00060"></a>00060         <span class="keyword">const</span> <span class="keywordtype">int</span> y = x &gt; 0.0f ? int(x) : int(x)-1;
<a name="l00061"></a>00061         <span class="keywordflow">return</span> (x - <span class="keywordtype">float</span>(y) &gt; 0.5f) ? float(y)+1.0f : float(y);
<a name="l00062"></a>00062 }
<a name="l00063"></a>00063 
<a name="l00065"></a>00065 <span class="keyword">inline</span> NIH_HOST_DEVICE <span class="keywordtype">float</span> <a class="code" href="group__vectors.html#ga5809911d15c32de18955c59865379695">min</a>(<span class="keyword">const</span> <span class="keywordtype">float</span> a, <span class="keyword">const</span> <span class="keywordtype">float</span> b) { <span class="keywordflow">return</span> a &lt; b ? a : b; }
<a name="l00066"></a>00066 
<a name="l00068"></a>00068 <span class="keyword">inline</span> NIH_HOST_DEVICE <span class="keywordtype">float</span> <a class="code" href="group__vectors.html#gab2b34b1991185fc29890973777b60e54">max</a>(<span class="keyword">const</span> <span class="keywordtype">float</span> a, <span class="keyword">const</span> <span class="keywordtype">float</span> b) { <span class="keywordflow">return</span> a &gt; b ? a : b; }
<a name="l00069"></a>00069 
<a name="l00071"></a>00071 <span class="keyword">inline</span> NIH_HOST_DEVICE int32 <a class="code" href="group__vectors.html#ga5809911d15c32de18955c59865379695">min</a>(<span class="keyword">const</span> int32 a, <span class="keyword">const</span> int32 b) { <span class="keywordflow">return</span> a &lt; b ? a : b; }
<a name="l00072"></a>00072 
<a name="l00074"></a>00074 <span class="keyword">inline</span> NIH_HOST_DEVICE int32 <a class="code" href="group__vectors.html#gab2b34b1991185fc29890973777b60e54">max</a>(<span class="keyword">const</span> int32 a, <span class="keyword">const</span> int32 b) { <span class="keywordflow">return</span> a &gt; b ? a : b; }
<a name="l00075"></a>00075 
<a name="l00077"></a>00077 <span class="keyword">inline</span> NIH_HOST_DEVICE uint32 <a class="code" href="group__vectors.html#ga5809911d15c32de18955c59865379695">min</a>(<span class="keyword">const</span> uint32 a, <span class="keyword">const</span> uint32 b) { <span class="keywordflow">return</span> a &lt; b ? a : b; }
<a name="l00078"></a>00078 
<a name="l00080"></a>00080 <span class="keyword">inline</span> NIH_HOST_DEVICE uint32 <a class="code" href="group__vectors.html#gab2b34b1991185fc29890973777b60e54">max</a>(<span class="keyword">const</span> uint32 a, <span class="keyword">const</span> uint32 b) { <span class="keywordflow">return</span> a &gt; b ? a : b; }
<a name="l00081"></a>00081 
<a name="l00083"></a>00083 <span class="keyword">inline</span> NIH_HOST_DEVICE uint32 quantize(<span class="keyword">const</span> <span class="keywordtype">float</span> x, <span class="keyword">const</span> uint32 n)
<a name="l00084"></a>00084 {
<a name="l00085"></a>00085         <span class="keywordflow">return</span> (uint32)<a class="code" href="group__vectors.html#gab2b34b1991185fc29890973777b60e54">max</a>( <a class="code" href="group__vectors.html#ga5809911d15c32de18955c59865379695">min</a>( int32( x * <span class="keywordtype">float</span>(n) ), int32(n-1) ), int32(0) );
<a name="l00086"></a>00086 }
<a name="l00088"></a>00088 <span class="keyword">inline</span> <span class="keywordtype">float</span> NIH_HOST_DEVICE <a class="code" href="group__vectors.html#ga278bc40e135ff21dd4c80375feccc703" title="compute the modulus of a vector">mod</a>(<span class="keyword">const</span> <span class="keywordtype">float</span> x, <span class="keyword">const</span> <span class="keywordtype">float</span> m) { <span class="keywordflow">return</span> x &gt; 0.0f ? fmodf( x, m ) : m - fmodf( -x, m ); }
<a name="l00089"></a>00089 
<a name="l00090"></a>00090 <span class="keyword">inline</span> NIH_HOST_DEVICE uint32 log2(uint32 n)
<a name="l00091"></a>00091 {
<a name="l00092"></a>00092     uint32 m = 0;
<a name="l00093"></a>00093     <span class="keywordflow">while</span> (n &gt; 0)
<a name="l00094"></a>00094     {
<a name="l00095"></a>00095         n &gt;&gt;= 1;
<a name="l00096"></a>00096         m++;
<a name="l00097"></a>00097     }
<a name="l00098"></a>00098     <span class="keywordflow">return</span> m-1;
<a name="l00099"></a>00099 }
<a name="l00100"></a>00100 
<a name="l00101"></a>00101 <span class="preprocessor">#ifdef __CUDA_ARCH__</span>
<a name="l00102"></a>00102 <span class="preprocessor"></span>
<a name="l00103"></a>00103 <span class="keyword">inline</span> NIH_DEVICE <span class="keywordtype">float</span> fast_pow(<span class="keyword">const</span> <span class="keywordtype">float</span> a, <span class="keyword">const</span> <span class="keywordtype">float</span> b)
<a name="l00104"></a>00104 {
<a name="l00105"></a>00105     <span class="keywordflow">return</span> __powf(a,b);
<a name="l00106"></a>00106 }
<a name="l00107"></a>00107 <span class="keyword">inline</span> NIH_DEVICE <span class="keywordtype">float</span> fast_sin(<span class="keyword">const</span> <span class="keywordtype">float</span> x)
<a name="l00108"></a>00108 {
<a name="l00109"></a>00109     <span class="keywordflow">return</span> __sinf(x);
<a name="l00110"></a>00110 }
<a name="l00111"></a>00111 <span class="keyword">inline</span> NIH_DEVICE <span class="keywordtype">float</span> fast_cos(<span class="keyword">const</span> <span class="keywordtype">float</span> x)
<a name="l00112"></a>00112 {
<a name="l00113"></a>00113     <span class="keywordflow">return</span> __cosf(x);
<a name="l00114"></a>00114 }
<a name="l00115"></a>00115 <span class="keyword">inline</span> NIH_DEVICE <span class="keywordtype">float</span> fast_sqrt(<span class="keyword">const</span> <span class="keywordtype">float</span> x)
<a name="l00116"></a>00116 {
<a name="l00117"></a>00117     <span class="keywordflow">return</span> __fsqrt_rn(x);
<a name="l00118"></a>00118 }
<a name="l00119"></a>00119 
<a name="l00120"></a>00120 <span class="preprocessor">#else</span>
<a name="l00121"></a>00121 <span class="preprocessor"></span>
<a name="l00122"></a>00122 <span class="keyword">inline</span> NIH_HOST_DEVICE <span class="keywordtype">float</span> fast_pow(<span class="keyword">const</span> <span class="keywordtype">float</span> a, <span class="keyword">const</span> <span class="keywordtype">float</span> b)
<a name="l00123"></a>00123 {
<a name="l00124"></a>00124     return ::powf(a,b);
<a name="l00125"></a>00125 }
<a name="l00126"></a>00126 <span class="keyword">inline</span> NIH_HOST_DEVICE <span class="keywordtype">float</span> fast_sin(<span class="keyword">const</span> <span class="keywordtype">float</span> x)
<a name="l00127"></a>00127 {
<a name="l00128"></a>00128     <span class="keywordflow">return</span> sinf(x);
<a name="l00129"></a>00129 }
<a name="l00130"></a>00130 <span class="keyword">inline</span> NIH_HOST_DEVICE <span class="keywordtype">float</span> fast_cos(<span class="keyword">const</span> <span class="keywordtype">float</span> x)
<a name="l00131"></a>00131 {
<a name="l00132"></a>00132     <span class="keywordflow">return</span> cosf(x);
<a name="l00133"></a>00133 }
<a name="l00134"></a>00134 <span class="keyword">inline</span> NIH_HOST_DEVICE <span class="keywordtype">float</span> fast_sqrt(<span class="keyword">const</span> <span class="keywordtype">float</span> x)
<a name="l00135"></a>00135 {
<a name="l00136"></a>00136     <span class="keywordflow">return</span> sqrtf(x);
<a name="l00137"></a>00137 }
<a name="l00138"></a>00138 
<a name="l00139"></a>00139 <span class="preprocessor">#endif</span>
<a name="l00140"></a>00140 <span class="preprocessor"></span>
<a name="l00141"></a>00141 <span class="preprocessor">#ifdef __CUDACC__</span>
<a name="l00142"></a>00142 <span class="preprocessor"></span><span class="keyword">inline</span> NIH_DEVICE uint16 float_to_half(<span class="keyword">const</span> <span class="keywordtype">float</span> x) { <span class="keywordflow">return</span> __float2half_rn(x); }
<a name="l00143"></a>00143 <span class="keyword">inline</span> NIH_DEVICE <span class="keywordtype">float</span>  half_to_float(<span class="keyword">const</span> uint32 h) { <span class="keywordflow">return</span> __half2float(h); }
<a name="l00144"></a>00144 <span class="preprocessor">#endif</span>
<a name="l00145"></a>00145 <span class="preprocessor"></span>
<a name="l00146"></a>00146 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;
<a name="l00147"></a><a class="code" href="structnih_1_1_field__traits.html">00147</a> <span class="keyword">struct </span><a class="code" href="structnih_1_1_field__traits.html">Field_traits</a>
<a name="l00148"></a>00148 {
<a name="l00149"></a>00149 <span class="preprocessor">#ifdef __CUDACC__</span>
<a name="l00150"></a>00150 <span class="preprocessor"></span>        NIH_HOST_DEVICE <span class="keyword">static</span> T min() { <span class="keywordflow">return</span> T(); }
<a name="l00151"></a>00151     NIH_HOST_DEVICE <span class="keyword">static</span> T max() { <span class="keywordflow">return</span> T(); }
<a name="l00152"></a>00152 <span class="preprocessor">#else</span>
<a name="l00153"></a>00153 <span class="preprocessor"></span>        <span class="keyword">static</span> T min()
<a name="l00154"></a>00154     {
<a name="l00155"></a>00155         <span class="keywordflow">return</span> std::numeric_limits&lt;T&gt;::is_integer ?
<a name="l00156"></a>00156              <a class="code" href="group__vectors.html#ga5809911d15c32de18955c59865379695">std::numeric_limits&lt;T&gt;::min</a>() :
<a name="l00157"></a>00157             -<a class="code" href="group__vectors.html#gab2b34b1991185fc29890973777b60e54">std::numeric_limits&lt;T&gt;::max</a>();
<a name="l00158"></a>00158     }
<a name="l00159"></a>00159         <span class="keyword">static</span> T max() { <span class="keywordflow">return</span> <a class="code" href="group__vectors.html#gab2b34b1991185fc29890973777b60e54">std::numeric_limits&lt;T&gt;::max</a>(); }
<a name="l00160"></a>00160 <span class="preprocessor">#endif</span>
<a name="l00161"></a>00161 <span class="preprocessor"></span>};
<a name="l00162"></a>00162 
<a name="l00163"></a>00163 <span class="preprocessor">#ifdef __CUDACC__</span>
<a name="l00164"></a>00164 <span class="preprocessor"></span><span class="keyword">template</span> &lt;&gt;
<a name="l00165"></a>00165 <span class="keyword">struct </span><a class="code" href="structnih_1_1_field__traits.html">Field_traits</a>&lt;float&gt;
<a name="l00166"></a>00166 {
<a name="l00167"></a>00167         NIH_HOST_DEVICE <span class="keyword">static</span> <span class="keywordtype">float</span> min() { <span class="keywordflow">return</span> -float(1.0e+30f); }
<a name="l00168"></a>00168     NIH_HOST_DEVICE <span class="keyword">static</span> <span class="keywordtype">float</span> max() { <span class="keywordflow">return</span>  float(1.0e+30f); }
<a name="l00169"></a>00169 };
<a name="l00170"></a>00170 <span class="keyword">template</span> &lt;&gt;
<a name="l00171"></a>00171 <span class="keyword">struct </span>Field_traits&lt;double&gt;
<a name="l00172"></a>00172 {
<a name="l00173"></a>00173         NIH_HOST_DEVICE <span class="keyword">static</span> <span class="keywordtype">double</span> min() { <span class="keywordflow">return</span> -double(1.0e+30); }
<a name="l00174"></a>00174     NIH_HOST_DEVICE <span class="keyword">static</span> <span class="keywordtype">double</span> max() { <span class="keywordflow">return</span>  double(1.0e+30); }
<a name="l00175"></a>00175 };
<a name="l00176"></a>00176 <span class="keyword">template</span> &lt;&gt;
<a name="l00177"></a>00177 <span class="keyword">struct </span>Field_traits&lt;int32&gt;
<a name="l00178"></a>00178 {
<a name="l00179"></a>00179         NIH_HOST_DEVICE <span class="keyword">static</span> int32 min() { <span class="keywordflow">return</span> -(1 &lt;&lt; 30); }
<a name="l00180"></a>00180     NIH_HOST_DEVICE <span class="keyword">static</span> int32 max() { <span class="keywordflow">return</span>  (1 &lt;&lt; 30); }
<a name="l00181"></a>00181 };
<a name="l00182"></a>00182 <span class="keyword">template</span> &lt;&gt;
<a name="l00183"></a>00183 <span class="keyword">struct </span>Field_traits&lt;int64&gt;
<a name="l00184"></a>00184 {
<a name="l00185"></a>00185         NIH_HOST_DEVICE <span class="keyword">static</span> int64 min() { <span class="keywordflow">return</span> -(int64(1) &lt;&lt; 62); }
<a name="l00186"></a>00186     NIH_HOST_DEVICE <span class="keyword">static</span> int64 max() { <span class="keywordflow">return</span>  (int64(1) &lt;&lt; 62); }
<a name="l00187"></a>00187 };
<a name="l00188"></a>00188 <span class="keyword">template</span> &lt;&gt;
<a name="l00189"></a>00189 <span class="keyword">struct </span>Field_traits&lt;uint32&gt;
<a name="l00190"></a>00190 {
<a name="l00191"></a>00191         NIH_HOST_DEVICE <span class="keyword">static</span> uint32 min() { <span class="keywordflow">return</span> 0; }
<a name="l00192"></a>00192     NIH_HOST_DEVICE <span class="keyword">static</span> uint32 max() { <span class="keywordflow">return</span> (1u &lt;&lt; 31u); }
<a name="l00193"></a>00193 };
<a name="l00194"></a>00194 <span class="keyword">template</span> &lt;&gt;
<a name="l00195"></a>00195 <span class="keyword">struct </span>Field_traits&lt;uint64&gt;
<a name="l00196"></a>00196 {
<a name="l00197"></a>00197         NIH_HOST_DEVICE <span class="keyword">static</span> uint64 min() { <span class="keywordflow">return</span> 0; }
<a name="l00198"></a>00198     NIH_HOST_DEVICE <span class="keyword">static</span> uint64 max() { <span class="keywordflow">return</span> (uint64(1) &lt;&lt; 63u); }
<a name="l00199"></a>00199 };
<a name="l00200"></a>00200 <span class="preprocessor">#endif</span>
<a name="l00201"></a>00201 <span class="preprocessor"></span>
<a name="l00202"></a>00202 } <span class="comment">// namespace nih</span>
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